Quick answer: To obtain the Igneous Rupturer Rod, you must complete the Scoria Reach bestiary, sacrifice 11 specific pearls at the Igneous Altar, place three elemental fragments on their pedestals, and fish inside the Scoria Volcano to reveal a hidden vendor selling the rod for 5,000,000C$.
The Igneous Rupturer Rod is an endgame tool in Fisch located on the island of Scoria Reach. Unlocking it requires a lengthy progression chain involving collection, sacrifice, and puzzle-solving. Before attempting to unlock the rod, ensure you have completed 100% of the Scoria Reach bestiary and possess the Scoria Armor to survive the environmental heat.
Collecting the 11 Pearls
The primary hurdle in this quest involves finding 11 distinct types of pearls to sacrifice at the Igneous Altar. These pearls are obtained as drops when catching Clams and Lava Clams. You cannot simply buy them; you must fish for the clams that contain them.
Standard Clams (Roslit Bay)
Seven of the required pearls drop from standard Clams. The most reliable location to farm these is Roslit Bay. Look for a fixed fishing pool on the northern side of the bay at coordinates (-1940, 130, 727), or check for an abundance zone near the Shipwright.
To maximize your catch rate for standard Clams, use Seaweed as bait. Some reports suggest fishing during foggy weather conditions improves consistency. When you catch a Clam, you have a chance to obtain one of the following pearls:
| Pearl Type | Rarity / Drop Chance |
|---|---|
| Pearl | 46.99% |
| Gilded Pearl | 19.58% |
| Rose Pearl | 19.58% |
| Mauve Pearl | 7.83% |
| Deep Pearl | 3.92% |
| Aurora Pearl | 1.96% |
| Golden Sea Pearl | 0.16% |
Lava Clams (Scoria Reach)
The remaining four pearls come from Lava Clams, which are found exclusively in the lava pools of Scoria Reach. A fixed pool is located opposite Ashbrook Town, and abundance zones often appear in the lava fishing area south of the merchant.
You must equip Coal Bait to catch Lava Clams efficiently. Fishing during the Spring Season may also yield better results. Cracking open a Lava Clam provides one of these four pearls:
- Ashy Pearl
- Sulfur Pearl
- Obsidian Pearl
- Igneous Pearl
Activating the Igneous Altar
Once you have all 11 pearl types in your inventory, head to the Igneous Altar at Scoria Reach. The altar is located behind the Angler’s House, to the left of the volcano, at coordinates (-5325, 138, -1280).
Approach the altar and equip each pearl one by one. Stand in front of the structure and press the interact key (E) to sacrifice them. As you place each pearl, a corresponding light will illuminate under the crab statue. You must sacrifice all 11 variants to proceed.
Finding and Placing Fragments
After the altar is fully lit, you need to obtain three specific fragments: Sulfur, Infernal, and Obsidian.
Travel to the Scoria Mines via the elevator located to the right of the Scoria Guard NPC. Inside, you will find dancing crabs. You can obtain fragments by giving pearls to these crabs, which initiates a mining animation. After approximately five minutes, the crabs will finish mining and may reward you with a fragment.
Once obtained, place the fragments on their respective pedestals scattered across Scoria Reach:
- Sulfur Fragment: Place near the first lava pool (approx. -5181, 160, -1187).
- Infernal Fragment: Place at the top of the volcano (approx. -5607, 262, -1731).
- Obsidian Fragment: Place beside the Infernal Isonade abundance area (approx. -5642, 163, -1685).
Purchasing the Igneous Rupturer Rod
With the pearls sacrificed and fragments placed, the final step requires you to enter the main crater of the Scoria Volcano. Ensure you are wearing Scoria Armor to negate the lava damage.
Cast your line into the lava inside the volcano. Fishing here will trigger a mechanism that opens a secret cavity beneath the central platform. Drop down into this chamber to find the rod vendor. The Igneous Rupturer Rod costs 5,000,000C$.
Igneous Rupturer Rod Stats
The Igneous Rupturer is a powerhouse for catching heavy fish and boasts high resilience.
- Lure Speed: 60%
- Luck: 100%
- Control: 0.3
- Resilience: 85%
- Max Weight: Infinite
- Passive: +5% Progress Speed
This rod also grants a small chance to apply the Igneous or Hexed mutation to your catch and has a hunt focus for the Skeletal Leviathan.